Gary Bell/ Oceanwide / Painted Sweetlips (Diagramma pictum) in Slender Cardinalfish (Rhabdamia gracilis) school, Great Barrier Reef, Australia

Gary Bell/ Oceanwide / Painted Sweetlips (Diagramma pictum) in Slender Cardinalfish (Rhabdamia gracilis) school near Double-headed Maori Wrasse (Cheilinus undulatus), Great Barrier Reef, Australia

Gary Bell/ Oceanwide / Double-headed Maori Wrasse (Cheilinus undulatus), Painted Sweetlips (Diagramma pictum), and Slender Cardinalfish (Rhabdamia gracilis) school, Great Barrier Reef, Queensland, Australia

Alex Mustard / Oriental sweetlips (Plectorhinchus vittatus) pair. South Ari Atoll, Madlives. Indian Ocean.

Jordi Chias / Oriental sweetlips (Plectorhinchus vittatus) South Ari Atoll, Maldives, Indian Ocean.

Alex Mustard / Ribbon sweetlips (Plectorhinchus polytaenia) USAT Liberty Wreck, Tulamben, Bali, Indonesia. Java Sea

Claudio Contreras / Spotted drum fish (Equetus punctatus) Puerto Morelos National Park, Caribbean Sea, Mexico, February

Alex Mustard / Harlequin sweetlips (Plectorhinchus chaetodonoides) cleaned by a pair of bluestreak cleaner wrasse (Labroides dimidiatus). South Atoll, Tubbataha Atolls, Tubbataha Reefs Natural Park, Palawan, Philipp...

Pete Oxford / Peruvian Grunt (Anisotremus scapularis) school, Galapagos Islands, Ecuador

Fred Bavendam / Oriental Sweetlips (Plectorhinchus vittatus) at cleaning station awaiting cleaner fish, Bali, Indonesia

Claudio Contreras / French Angelfish (Pomacanthus paru) with a Smallmouth Grunt (Haemulon chrysargyreum) and Blade Fire Coral (Millepora complanata). Cancun National Park, Caribbean Sea, Mexico.

Alex Mustard / Bluestriped grunt (Haemulon sciurus) portrait, West End, Grand Cayman, Cayman Islands, British West Indies, Caribbean Sea.